jahar tamerlan tsarnaev is charged with attempting to use a weapon of mass destruction. he could face the death penalty. we are also learning more about what happened to the m.i.t. police officer who was killed. a source close to the investigation says that he was shot four to five times as he sat in his patrol car and was unable to radio in for help. a memorial service will be held for him tomorrow. we're told that vice president joe biden will be attending that. >> all right. thank you, tori. >>> back here at home, san francisco police remain on high alert following the boston marathon bombings. the police department increased patrols and transit centers, sports events and other possible targets. and there soon could be more security cameras on market street. police are saying one of the best tools they have are our eyes and ears, the public. officers are telling everybody, watch out for anything unusual and immediately report any suspicious activity. >>> 7:32. even though crime has increased in san jose, public complaints about the public police have decreased. janine